1991 San Marino Grand Prix
- Round
- 3 of 1991
- Circuit
- Autodromo Enzo e Dino Ferrari
- Location
- Imola, Italy
- Dates
- —
- Format
- Standard weekend
- Winner
- Ayrton Senna
- Constructor
- McLaren
- Entrant
- McLaren-Honda
- Pole position
- Ayrton Senna
- Fastest lap
- Gerhard Berger
- Confidence
- reference